Pros: Super easy to mount
Low profile
Very solid
pretty quite

Cons: Not to many. I bought mine for less than $20 and seem s like a good bargain, however it now shows $53.82!!!! wth

Other Thoughts: It WAS a good deal, if its really $53.82 now that's redickulous! You can buy like 3 coolers for that price, or if you have room liquid cooler.

Pros: Cheap.
Works.

Cons: Tough to attach to M/B, Chip.

Came with thermal paste installed on it. (Buy your own!)

Other Thoughts: Used it for a Core i7-6700k Skylake. (6th Gen.) Already had thermal paste on it. Once I attached it, CPU started overheating. Destroyed my SATA HDD's. Couldn't game because the black screen of death occurred everytime I clicked on the program. Once I figured it out, I removed the thermal paste that came with it and applied paste I bought separately. Now everything is fine...for now. I'll admit, I'm still new to cpu building, but word of advice, buy your own thermal paste! and get HW monitor. Helps a lot.

Pros: Very happy on my purchase. I was a bit confused on how to install it, till I realized I should have paid more attention to the parts bag I stuck in a different box when I initially unpacked it! Mounts in very well. I'm pretty sure this would fit in a 2U rack case (perhaps 1U, it is very low so check the measurements). A major influence for me was get a low-profile one - some CPU fans are too high. My CPU is the socket 1151.

Cons: None, be careful not to overtorque your screws. It shouldn't need much to hold it in and it is a very solid fit when you do.

Other Thoughts: Be careful as there is heat dissipation material on the bottom, I test fit mine in before realizing some of the gray goo on the bottom was on my cpu shipping filler cap (oops, lesson learned to first plugin in the cpu first when test fitting a fan also when trying to make sure holes align).

Pros: Easy to install. Silent fan. Nice price

Cons: cooling product on heat sink is cheap but it make the job!

Pros: Price, compatibility, and a very simple secure mounting solution.
Removable fan for cleaning/maintenance, and if need be replacement, without removing the entire heat-sink.

Cons: You'll have to remove the motherboard if your case's motherboard tray doesn't have a hole to access the back of the motherboard.

Other Thoughts: Mine arrived with one small problem from the factory.
It was missing one of the spacers/insulators on one of the back-plate posts that I was able to fix easily.

Pros: installation was smooth. Adhesive on the backing plates made the installation as easy as it gets. I would buy this again for the next system.

Cons: None. Fanless would have been nice - but that's more of an Intel thing :)

Pros: Price works Fantastic after buying I saw that the specs said supports up to 77 watts. My 2500k is 95w it works and runs under 100 D. Very Quiet and running at 3.8 I bought 2 of these because of price and I only need to run One fan at a time so this gives me a back up fan.

Cons: I hate the push pins now I can just screw it in

Other Thoughts: I have 2 M.B. Z77 with the same 2500 I switch back and forth the chip. You only need a case and M.B. with H.D. and Win. the rest are all interchangeable same V.C. and Ram and Chip. Saves money on buying 2 full PCs.

Pros: This fan is incredibly secure once it is properly mounted. I like fans that are incredibly secure on the CPU and motherboard.

This fan is one of the few I could find on "the egg" that was for Intel CPUs (Ivy Bridge 1155 in my case), used screws not pins, had a 4-pin fan connector, and the fan speed actually was and is variable.

The retainers on the back of the motherboard can be fitted in different ways depending on clearance issues.

I found the clearance on the retainers to be very close to the motherboard, about 2-3 millimeters. They seem to require about the same "depth" as the CPU backing plate on the back of the motherboard.

Cons: None of my "cons" would prevent me from buying this fan again if I needed one. Think of my "cons" more as "gotchas" or "observations".

You must remove the motherboard from the case to install this fan because you need access to both top and bottom.

Fitting the fan and retainers to the motherboard can be tricky. I found it necessary to place the motherboard on a flat surface so the screw-mounts would slightly protrude through the holes in the motherboard. Some would call this "fiddly".

The holes on my motherboard were almost exactly spaced for the retainers; 1 hole required "gentle persuasion".

Get each screw "started" on it's retainer mount before tightening them down. You can still "wiggle the fan" a little bit at this point to ensure good contact between the thermal paste on the fan and the CPU lid.

Next, I suggest a turn or two on each screw and keep working around all 4 screws (1->2->3->4->1->2, etc.) until all 4 are "snug". This way force is applied evenly during the mounting process.

When turning the screws, turn them slowly and "by hand" until they feel like they have "bottomed out". At that point the screws cannot be turned any tighter without breaking something, but the screws are now "snug" and the fan will be securely mounted.

Other Thoughts: Please note: This fan is designed for mounting on Intel CPUs. It cannot work on an AMD CPU since there are no mounting devices for AMD.

Make sure the retainers do not come into contact with any components on the back of the motherboard. That includes making sure any electrical leads that are soldered through the board and protruding on the back are not touched by the retainers.

I found my board could take this fan as slow as about 700 RPM, but YMMV. If your motherboard runs a 4-pin CPU fan at full speed all the time even when there is no CPU load and no overclocking, suspect an issue with the motherboard or BIOS setup. I am using this fan on an AsRock "H61 MV-ITX" ("mini ITX") board and it exhibits poor CPU fan control under current Linux with LM Sensors. This issue is documented elsewhere on the Web for various AsRock boards.

My prior CPU experiences have been AMD and they use a very stiff spring clip to secure the fan to the CPU. The Intel method of "push pins" seems very poor in comparison and I have had a number of Intel "push pin" fan mounts come loose.

Above all. Be very patient. Pay very close attention to the details of mounting this fan. Take your time. Do not rush when mounting this fan. The payoff is a securely mounted variable speed fan (depending on your motherboard) that should last many years.

If you do a "rush job" when mounting this fan and accidentally create a short circuit with the mounting, you could damage your CPU, your motherboard, your power supply, your case, or worse.